import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.BlockLocation;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;

//查詢某個檔案在HDFS叢集中的位置
public class FindFile {
	public static void main(String[] args) throws IOException {
		Configuration conf = new Configuration();
		FileSystem fileSystem = FileSystem.get(conf);
		// 必須是一個具體的檔案
		Path path = new Path("/usr/demo.txt");
		// 檔案狀態
		FileStatus fileStatus = fileSystem.getFileStatus(path);
		// 檔案塊
		BlockLocation[] blockLocations = fileSystem.getFileBlockLocations(
				fileStatus, 0, fileStatus.getLen());
		int blockLen = blockLocations.length;
		System.err.println("block Count:" + blockLen);
		for (int i = 0; i < blockLen; i++) {
			//主機名
			String[] hosts = blockLocations[i].getHosts();
			for(String s:hosts){
				System.err.println(s);
			}
		}
	}

}
 

Console:

block Count:1
huangpeng-K53SD